r[7<<14];c(int*a,int*b){return*a-*b;}main(i,n){for(scanf("%d",&n),i=0;i<n;scanf("%d",r+i++));for(scanf("%d",&i);~scanf("%d",&i);printf("%d\n",i<0?-1:i))i=bsearch(&i,r,n,4,c),i-=(int)r,i/=4;}
